package com.yj.lottery_system.common.utils;

import com.fasterxml.jackson.core.JacksonException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.yj.lottery_system.common.pojo.CommonResult;
import org.springframework.boot.json.JsonParseException;
import org.springframework.util.ReflectionUtils;

import java.util.List;
import java.util.concurrent.Callable;

public class JacksonUtil {
    public JacksonUtil() {
    }

    //单例操作
    private final static ObjectMapper OBJECT_MAPPER;
    static {
        OBJECT_MAPPER = new ObjectMapper();
    }

    public static ObjectMapper getObjectMapper() {
        return OBJECT_MAPPER;
    }

    //仿照json\AbstractJsonParser.class，处理异常
    private static  <T> T tryParse(Callable<T> parser) {
        return tryParse(parser, JacksonException.class);
    }
    private static  <T> T tryParse(Callable<T> parser, Class<? extends Exception> check) {
        try {
            return parser.call();
        } catch (Exception var4) {
            if (check.isAssignableFrom(var4.getClass())) {
                throw new JsonParseException(var4);
            }
            throw new IllegalStateException(var4);
        }
    }
    //序列化
    public static String writeValueAsString(Object o) {
        return JacksonUtil.tryParse( ()->{
            return JacksonUtil.getObjectMapper().writeValueAsString(o);
        });
    }
    //反序列化
    public static <T> T readValue(String s, Class<T> valueType) {
        return JacksonUtil.tryParse(() -> {
            return JacksonUtil.getObjectMapper().readValue(s, valueType);
        });
    }

    //反序列化list
    public static <T> T readListValue(String s, Class<?> paramClasses) {
        JavaType javaType = JacksonUtil.getObjectMapper().getTypeFactory().constructParametricType(List.class, paramClasses);

        return JacksonUtil.tryParse(() -> {
            return JacksonUtil.getObjectMapper().readValue(s, javaType);
        });
    }
}
